22003993 has 8 divisors (see below), whose sum is σ = 24238656. Its totient is φ = 19808400.

The previous prime is 22003979. The next prime is 22004009. The reversal of 22003993 is 39930022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22003993 - 2⁹ = 22003481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22003903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8578 + ... + 10843.

It is an arithmetic number, because the mean of its divisors is an integer number (3029832).

Almost surely, 2^22003993 is an apocalyptic number.

It is an amenable number.

22003993 is a deficient number, since it is larger than the sum of its proper divisors (2234663).

22003993 is a wasteful number, since it uses less digits than its factorization.

22003993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19535.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 22003993 is about 4690.8413957413. The cubic root of 22003993 is about 280.2208843780.

The spelling of 22003993 in words is "twenty-two million, three thousand, nine hundred ninety-three".